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In a sample of 347 university students and community residents, measures of meaningfulness, self-esteem, internal locus of control, positive social relationships and optimism were given to predict subjective well-being, i.e., measures of happiness, life satisfaction, and affect balance. Correlations, canonical correlations, and structural equation modeling supported the hypothesis that meaningfulness is a significant mediator between personality variables and subjective well-being.
William C. Compton (Tue,) studied this question.